If you have a cognitively-challenged underclass, as every large nation has, you need some anchoring institutions for them to aspire to; and those institutions should have some continuity and stability. Heterosexual marriage is a key such institution. In a society in which nobody had an IQ below 120, homosexual marriage might be plausible. In the actual societies we have, other considerations kick in.

Some questions:

1)Why 120 as the magic number? Why not 110, or 105? Isn't it awfully paternalistic and central planner-ish to pick a number in this fashion?

3)If a few I.Q. magnets continue to attract a disproportionate share of workers with I.Qs over 120, is Derbyshire okay with having gay marriages there? That is, if gay marriage is legal in Arlington or Silicon Valley, will the cognitive underclasses in, say, Arkansas still be safe from its pernicious effects? Can we legalize gay marriage in Dupont but leave Anacostia alone?

Onto #5:

Human nature exists, and has fixed characteristics. We are not infinitely malleable. Human society and human institutions need to ”fit” human nature, or at least not go too brazenly against the grain of it. Homophobia seems to be a rooted condition in us. It has been present always and everywhere, if only minimally (and unfairly — there has always been a double standard here) in disdain for “the man who plays the part of a woman.” There has never, anywhere, at any level of civilization, been a society that approved egalitarian (i.e. same age, same status) homosexual bonding. This tells us something about human nature — something it might be wisest (and would certainly be conservative-est) to leave alone.

Yes, human nature's infinitely malleable, but it's not infinitely non-malleable; I believe Derbyshire himself is on record elsewhere saying that evolution is still occurring. Yes, history tells us something, to use Derbyshire's terminology, about the desirability of gay marriage. But we don't quite know what. Maybe those centuries of tradition give us the right answer, but maybe they don't. It's just lazy to use tradition as an excuse not to engage our reason and our moral sympathies to come up with the best answers to these question that we can. This is why I cannot, and will never be, a true Burkean.

This points to one of my other sources of frustration with Burkean traditionalist types: as I understand them, they counsel that change should always come through slow, gradual social movements. If gay marriage is good, some kind of vast social movement will organically rise up in support of it; if it's not, than none will. They ignore the fact that social movements are not hurricanes or earthquakes; rather, social movements are comprised of individual human beings making individual decisions about whether to join a movement. The anti-slavery movement succeeded because thousands of humans thought about this institution and decided something was wrong with it. Harriet Beecher Stowe decided to write Uncle Tom's Cabin, instead of churning butter, flipping through the Godey Lady's Book, or doing whatever else it was people did for fun in the 1850s. So, too, the gay marriage movement will succeed or not because lots of individual humans decided that fighting for it was more or less worthwhile than playing X-box. I fear Burkeanism doesn't tell us much about whether it's worth it to put aside those fun activities in pursuit of revolutionary goals.